react-native-firebase set badge count [ custom count ] android, not working. shows default count

I want to show custom count in badge android. while send cloud message the count will be 1 or 2 etc.. shows correctly. But i need to show while sending cloud message custom count. (ie: 10 or 20 or 30 );

config details

"react": "16.6.3","react-native": "0.58.6","react-native-firebase": "^5.4.3",    let badgeCount = await firebase.notifications().getBadge();    firebase.notifications().setBadge(badgeCount + 2);                (Or)    firebase.notifications().setBadge(10);